This guy continues to blow my mind. Some tips on formatting
punctuation in a visually appealing way. Check out the section on how
to center things horizontally. And naturally there's a bonus section on
the proper formatting of smileys as punctuation.

Reading this stuff is a good way to remind myself why I'm a crappy visual
designer.

Plus there's an article on designing well by designing
badly on purpose. This method is ingenious, since it lets you imagine
your users as super-intelligent enemies and then work to defeat them.
Considering how hard it is to really believe how helpless users can be,
overestimating them could be much easier.